Ok I am gettin ready to frame up the cold room. So a couple of questions...#1 are 2x4 walls thick enough or should I go 2x6 or 2x8? Second question.. I would like to split the room into a ferm chamber and an actual cold room. Has anyone ever split a room like this and put temperature controlled fans into the wall between the sections to come on whenever the temp in the ferm chamber get above 62 or so degrees to blow cold air from the cold room into the ferm chamber then kick back off at 58-59 degrees?? Obviously they would have to be something that opened and closed as well as kick on. Any ideas or suggestions?.. I have also considered just setting a chest freezer in the ferm room with taps through the wall.